Netstat

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netstat

The netstat command in Linux
Developer(s)	Various open-source and commercial developers
Initial release	1983; 42 years ago (1983)
Written in	Plan 9: C
Operating system	Unix, Unix-like, Plan 9, Inferno, OS/2, Microsoft Windows, ReactOS
Platform	Cross-platform
Type	Command
License	OS/2, Windows: Proprietary commercial software net-tools, ReactOS: GPLv2 Plan 9: MIT License

In computing, netstat is a command-line network utility that displays open network sockets, routing tables, and a number of network interface (network interface controller or software-defined network interface) and network protocol statistics. It is available on Unix, Plan 9, Inferno, and Unix-like operating systems including macOS, Linux, Solaris and BSD. It is also available on IBM OS/2 and on Microsoft Windows NT-based operating systems including Windows XP, Windows Vista, Windows 7, Windows 8 and Windows 10.

It is used for finding problems in the network and to determine the amount of traffic on the network as a performance measurement.^[1] On Linux this program is mostly obsolete, although still included in many distributions.

On Linux, netstat (part of "net-tools") is superseded by ss (part of iproute2). The replacement for netstat -r is ip route, the replacement for netstat -i is ip -s link, and the replacement for netstat -g is ip maddr, all of which are recommended instead.^[2][3][4][5]